WO2021053827A1

WO2021053827A1 - Terminal

Info

Publication number: WO2021053827A1
Application number: PCT/JP2019/037092
Authority: WO
Inventors: 高橋　秀明; 天楊閔
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2021-03-25
Also published as: CN114375587B; CN114375587A

Abstract

UE (200A) controls access to and from a network. UE (200A) transmits, to the network, a message including a connection establishment cause indicating that the type of access to the network is a more reliable or lower latency communication than another type of access.

Description

Terminal

The present invention relates to a terminal that executes access control to a network.

The 3rd Generation Partnership Project (3GPP) is a specification of Long Term Evolution (LTE), LTE-Advanced (hereinafter referred to as LTE including LTE-Advanced), and 5th generation mobile communication system for the purpose of further speeding up LTE. Specifications (also called 5G, New Radio (NR) or Next Generation (NG)) are also underway.

NR defines the technology to provide high-reliability and low-latency communication (URLLC: Ultra-Reliable and Low Latency Communications).

In order to provide such URLLC more reliably, it is also being considered to use a dedicated mobile communication network called Non-Public Network (NPN) instead of the public mobile communication network (PLMN: Public Land Mobile Network). (Non-Patent Document 1).

The NR also stipulates that terminals for NPN (User Equipment, UE, hereinafter also referred to as NPN-UE) can access PLMN services via NPN or autonomously (Non-Patent Documents). 2).

However, the above-mentioned NPN-UE access to PLMN services has the following problems. Specifically, if the NPN-UE cannot connect to the NPN due to an NPN failure or the like, the NPN-UE may request a connection with the PLMN.

As mentioned above, NPN-UE may be used to provide URLLC and requires high quality of service (QoS), especially when a large number of NPN-UEs access PLMN all at once (connection request). , Wireless resources are tight, and there is a concern that it will adversely affect the communication of UE for PLMN (hereinafter, also referred to as PLMN-UE).

Therefore, the present invention has been made in view of such a situation, and even when URLLC such as NPN-UE is provided and PLMN is accessed, the communication of other terminals such as PLMN-UE is adversely affected. The purpose is to provide a terminal that can be suppressed.

One aspect of the present disclosure is to establish a connection between a control unit (access control unit 230) that controls access to a network and an access type indicating that the access type to the network is higher reliability or lower delay communication than other access types. It is a terminal (UE200A) including a transmission unit (connection message transmission unit 240) that transmits a message including a reason to the network.

FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10. FIG. 2 is a functional block configuration diagram of the UE 200A. FIG. 3 is a functional block configuration diagram of the gNB 100A. FIG. 4 is a diagram showing an example of a communication sequence related to establishment of an RRC connection and access control between a terminal (UE200A) and a network. FIG. 5 is a diagram showing a configuration example of RRCSetupRequest. FIG. 6 is a diagram showing a configuration example of a mapping table used for access control in the UE 200A. FIG. 7 is a diagram showing an example of the hardware configuration of gNB100A, gNB100B, UE200A and UE200B.

Hereinafter, embodiments will be described based on the drawings. The same functions and configurations are designated by the same or similar reference numerals, and the description thereof will be omitted as appropriate.

(1) Overall Schematic Configuration of Wireless Communication System FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10 according to the present embodiment. The wireless communication system 10 is a wireless communication system according to 5G New Radio (NR).

The wireless communication system 10 may include a plurality of mobile communication networks. Specifically, the wireless communication system 10 includes PublicLandMobileNetwork20 (hereinafter, PLMN20) and Non-PublicNetwork40 (hereinafter, NPN40).

PLMN20 may be called a public mobile communication network, a mobile communication network, a public terrestrial mobile network, etc. PLMN20 includes a network node 30 and a radio base station 100A (hereinafter, gNB100A). In addition, PLMN20 may be interpreted as an operator (telecommunications carrier) that provides services using PLMN20.

Network node 30 is a network device that constitutes PLMN20. Specifically, the network node 30 may be interpreted as a communication node that realizes functions such as Access and Mobility Management Function (AMF) and Session Management Function (SMF).

gNB100A is a wireless base station that complies with 5G (NR) and executes wireless communication according to 5G with user terminal 200A (User Equipment 200A, hereinafter UE200A) and user terminal 200B (User Equipment 200B, hereinafter UE200B). To do. The gNB100A is also a network device constituting the PLMN20, and the gNB100A may realize some of the functions of the AMF or SMF in place of the AMF or SMF.

NPN40 may be called a non-public mobile communication network, a non-public network, a dedicated network, etc., and the NPN40 includes a radio base station 100B (hereinafter, gNB100B).

NPN40 may be intended for single use of private entities such as enterprises, and can be deployed in various configurations using both virtual and physical elements. Specifically, it may be deployed as a completely standalone network (Stand-alone Non-Public Network (SNPN)), hosted by PLMN20, or provided as a slice of PLMN20. The NPN may be called a Closed Access Group (CAG).

That is, wireless communication system 10 (5G system) may support Non-Public Network (NPN) and NPN that provides coverage within a specific geographic area. 5G systems can support both physical and virtual NPNs and may support standalone operation of NPNs. On the other hand, the 5G system may provide access to the subscribed PLMN service via NPN, or access to the selected NPN service via PLMN.

In addition, wireless communication system 10 (5G system) supports the mechanism for UE200A for NPN to identify and select NPN.

In the present embodiment, a mobile communication network including PLMN20 and NPN40 different from PLMN20 may be simply expressed as a network. That is, the network may include PLMN20 and NPN40.

GNB100A forms cell C10. gNB100B forms cell C20. UE200B (PLMN-UE) for PLMN is located in cell C10 and can be connected to gNB100A. The UE200A (NPN-UE) for NPN can also access the subscribed PLMN service via NPN, as described above.

Also, UE200A is in cell C20 and can be connected to gNB100B. If access to the selected NPN service is provided via PLMN, the UE200B can also access the NPN service.

UE200B for PLMN may be understood as a terminal having a contract with an operator who provides services using PLMN20. In addition, the UE200A for NPN does not necessarily have to be a terminal that has a contract with an operator that provides services using NPN40, but even if it is understood that the use of services using NPN40 is permitted. Good.

The specific configuration of the wireless communication system 10 including the number of gNBs and UEs is not limited to the example shown in FIG. In addition, gNB and UE are Massive MIMO that generates a beam with higher directivity by controlling radio signals transmitted from multiple antenna elements, and carrier aggregation (CA) that bundles and uses multiple component carriers (CC). ), And dual connectivity (DC) that communicates between the UE and each of the two NG-RAN Nodes at the same time.

(2) Functional block configuration of the wireless communication system Next, the functional block configuration of the wireless communication system 10 will be described. Specifically, the functional block configuration of UE200A and gNB100A will be described.

(2.1) UE200A
FIG. 2 is a functional block configuration diagram of the UE 200A. As shown in FIG. 2, the UE 200A includes a wireless transmission unit 210, a wireless reception unit 220, an access control unit 230, a connection message transmission unit 240, and an access category holding unit 250.

The wireless transmitter 210 transmits a wireless signal according to the 5G specifications. In addition, the wireless receiver 220 receives a wireless signal according to the 5G specifications.

The access control unit 230 controls access to the UE200A network. Specifically, the access control unit 230 controls access (which may be called a connection) of the UE 200A to PLMN20 and NPN40. In the present embodiment, the access control unit 230 constitutes a control unit.

More specifically, the access control unit 230 executes access control to the network in accordance with the integrated access control (UAC) specified in 3GPP TS24.501 and the like.

The access control unit 230 determines a table (Mapping table for access) held in the access category holding unit 250 in order to determine an access type (which may be called an access category) applicable to the access attempt (attempt) of the UE 200A. Check the rules of categories) (see TS24.501 Table 4.5.2.2) and use the access categories that match the barring check.

That is, the access control unit 230 controls access to the network based on the access type (access category) held in the access category holding unit 250.

Access control unit 230 executes access control for access attempts defined by the following event list.

-When the UE200A is in 5GMM-IDLE mode for 3GPP access and an event occurs that requires a transition to 5GMM-CONNECTED mode-The UE200A is in 5GMM-CONNECTED mode via 3GPP access, or the radio resource control layer ( In 5GMM-CONNECTED mode with inactive display of RRC), when any of the predetermined events occurs, the operation related to access control of UE200A will be described later.

The connection message transmitter 240 transmits a message requesting a connection to the network. Specifically, the connection message transmission unit 240 transmits a message including a reason for establishing a connection with the network (establishment cause) to the network. In the present embodiment, the connection message transmission unit 240 constitutes a transmission unit.

The connection message transmitter 240 uses mo (mobile originating) -Data, mo-VoiceCall, mo-VideoCall, mo-SMS (Short Message Service), mps (multimedia priority service) -PriorityAccess, mcs (mission critical) as the reason for establishing the connection. service)-Can send messages containing Priority Access.

In the present embodiment, the connection message transmission unit 240 can also transmit a message including high-reliability and low-delay communication (URLLC) as a reason for establishing the connection. That is, the connection message transmission unit 240 can send a message to the network including a connection establishment reason indicating that the access type (access category) to the network is higher reliability or lower delay communication than other access types. ..

The name of URLLC used as the reason for establishing a connection (substantially, access type (access category)) does not necessarily have to be URLLC, as long as it indicates high reliability or low latency communication. For example, it may be URLLC service (low latency service), industrial IoT (IIOT) service, high security, high reliability service, high QoS service, or the like. That is, any name may be used as long as it indicates high demanding at various service levels such as speed (delay), radio quality, and error tolerance.

The connection message transmission unit 240 can send an RRC message including the reason for establishing the connection. Specifically, the connection message transmission unit 240 can send an RRCSetupRequest including establishment cause such as URLLC. The connection message transmission unit 240 may use another RRC message (for example, RRCReconfiguration), or may use a message of another layer if it can be shown that the access type is URLLC.

Further, the transmission timing of the message (specifically, the reason for establishing the connection) is not particularly limited, and may be any time from the start to the completion of the connection procedure with the network, or even after the connection with the network is completed. In particular, in the present embodiment, when the UE 200A transitions from the NPN 40 to the PLMN 20, the connection message transmission unit 240 can transmit a message including the reason for establishing the connection to the PLMN 20.

The access category holding unit 250 holds information about the access category. As described above, the access category may be called an access type (type) or the like.

Specifically, the access category holding unit 250 holds the table (Mapping table for access categories, see FIG. 6) specified in TS24.501 Table 4.5.2.2.

The table includes URLLC as a new access category. In the present embodiment, the access category holding unit 250 constitutes a holding unit that holds an access type (access category) associated with high-reliability or low-delay communication.

(2.2) gNB100A
FIG. 3 is a functional block configuration diagram of the gNB 100A. As shown in FIG. 3, the gNB100A includes a wireless transmission unit 110, a wireless reception unit 120, a connection processing unit 130, and an access regulation unit 140.

The wireless transmitter 110 transmits a wireless signal according to the 5G specifications. In addition, the wireless receiver 120 receives a wireless signal according to the 5G specifications.

The connection processing unit 130 executes processing related to connection with UE200A (and UE200B, the same applies hereinafter). Specifically, the connection processing unit 130 executes processing related to the connection (RRC connection) in the RRC layer.

In addition, the connection processing unit 130 sets a wireless bearer (Signalling Radio Bearer (SRB), Data Radio Bearer (DRB)) via a channel set as UE200A. Further, the connection processing unit 130 transmits / receives Protocol Data Unit (PDU) and Service Data Unit (SDU), specifically, a plurality of layers (medium access control layer (MAC), wireless link control layer (RLC), and Performs PDU / SDU assembly / decomposition at the Packet Data Convergence Protocol Layer (PDCP), etc.).

Channels include control channels and data channels. The control channel includes PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), PRACH (Physical Random Access Channel), PBCH (Physical Broadcast Channel) and the like.

The data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel).

The reference signal includes Demodulation reference signal (DMRS), Sounding Reference Signal (SRS), Phase Tracking Reference Signal (PTRS), and Channel State Information-Reference Signal (CSI-RS), and the signal includes a channel. , RRC layer and other control signals and reference signals are included. Further, the data may mean data transmitted via a data channel.

Access control unit 140 regulates access to the UE200A network. Specifically, the access control unit 140 implements access control in accordance with UAC specified in 3GPP TS24.501 and the like.

More specifically, the access regulation unit 140 acquires the access category to which the access regulation is applied based on a plurality of access categories defined in the network.

The access regulation unit 140 may acquire the access category to which the access regulation is applied from the network node 30, or may determine the access category to which the access regulation is applied by itself according to the load status of the gNB 100A. Further, the number of access categories to which access regulation is applied at the same time may be one or a plurality.

The access control unit 140 notifies the acquired access category in cell C20. Specifically, the access control unit 140 notifies the acquired access category in the cell C20 by using the system information, that is, the System Information Block (SIB).

The type of SIB used for the notification is not particularly limited, but typically uac-BarringInfo included in SIB1 is used.

(3) Operation of the wireless communication system Next, the operation of the wireless communication system 10 will be described. Specifically, the application of access regulation in the network and the operation related to the access control of the terminal based on the access regulation will be described.

(3.1) Schematic operation First, an outline of the operation targeted in the present embodiment will be described. If the NPN-UE (UE200A) cannot connect to the NPN40 due to a failure of the NPN40, or if a large number of NPN-UEs access the PLMN all at once (connection request), the PLMN-UE (UE200B) may be adversely affected.

In particular, NPN-UE may be used to provide URLLC, the required quality of service (QoS) is high, and the required wireless resources tend to increase. Therefore, if the success of NPN-UE is allowed without restriction and without limitation, PLMN-UE may have inconveniences such as difficulty in starting a random access procedure using RACH.

More specifically, if the NPN-UE has a contract (normal contract) that can also access the PLMN20, the NPN-UE can make an RRC connection to the PLMN20. When multiple NPN-UEs used to provide URLLC require high quality of service (QoS) all at once, it is desirable to apply UAC access restrictions in order to suppress the adverse effects described above.

Therefore, this embodiment suppresses adverse effects on PLMN-UE by effectively regulating access to the NPN-UE network (PLMN20) used to provide URLLC while following the UAC mechanism.

Specifically, a new access category (high reliability / low latency communication) is defined, and UE access requests are controlled according to UAC.

The new access category (high-reliability, low-latency communication) is positioned as a category that requires support for extremely low latency and extremely high communication service availability. This may mean very high reliability. The overall service delay depends on the delay of the wireless interface, transmission within the 5G system, transmission to servers outside the 5G system, and data processing.

Scenarios that require such very low latency and very high communication service availability support include motion control, discrete automation, process automation, power distribution automation, intelligent transportation systems, remote control, and rail communications. And AR (Augmented Reality) / VR (Virtual Reality).

(3.2) Detailed operation FIG. 4 shows an example of a communication sequence related to establishment of an RRC connection and access control between a terminal (UE200A) and a network.

As shown in FIG. 4, the UE200A (NPN-UE) sends an RRCSetupRequest to the network (here, assuming the transition from NPN40 to PLMN20 (cell reselection)) (S10).

The RRCSetupRequest includes the establishment cause of the RRC connection.

FIG. 5 shows a configuration example of RRCSetupRequest. As shown in FIG. 5, the RRCSetupRequest includes an establishment cause. In particular, in this embodiment, URLLC service (see underlined part), which means highly reliable and low-delay communication, is defined.

UE200A sends an RRC Setup Request with URLLC service set as the reason for establishing a connection.

The network (PLMN20) executes the RRC connection establishment procedure based on the received RRCSetupRequest and establishes the RRC connection with the UE200A (S20 to S40). In addition, settings such as SRB and DRB (not shown in FIG. 4) are executed, and the UE200A starts communication via the network.

The network (PLMN20) can activate access restrictions according to the congestion status of the network. Here, the network activates access restrictions for the URLLC service.

The network (PLMN20) sets the URLLC service in the uac-Access Category of uac-BarringInfo included in SIB1, and SIB1 including such uac-BarringInfo is transmitted to UE200A (S50).

As mentioned above, access regulation is applied for each access category, so URLLC service by UE200A is subject to access regulation, but other services (for example, mo-Data, mo-VoiceCall, etc.) are subject to access regulation. Not subject to.

UE200A executes access control based on the contents of uac-BarringInfo included in the received SIB1 (S60).

FIG. 6 shows a configuration example of a mapping table used for access control in UE200A. Specifically, FIG. 6 is a configuration example of Mapping table for access categories defined in 3GPP TS24.501 Table 4.5.2.2.

As shown in FIG. 6, the mapping table includes URLLC as an access category.

As mentioned above, when it is necessary to access the 5G system, the UE200A first executes an access control check to determine whether access is permitted. The UE200A checks the rules in the mapping table and uses the access category that matches the barring check to determine the access category applicable to the attempt.

If the access attempt matches multiple rules, the access category with the lowest rule number is selected. Further, if the access attempt matches the access category definition of a plurality of operator definitions, the UE may select the access category from the access category definition of the operator definition having the lowest priority value.

(4) Action / Effect According to the above-described embodiment, the following action / effect can be obtained. Specifically, UE200A (same for UE200B) indicates that the access type (access category) to the network (PLMN20) is higher reliability or lower latency communication (URLLC) than other access types (connection establishment reason). A message (RRCSetupRequest) containing (establish cause) can be sent to the network (PLMN20).

Therefore, the network (specifically, gNB100A) can recognize that UE200A (NPN-UE) accesses PLMN20 to provide URLLC. As a result, the network can efficiently regulate the URLLC service, which has a high required quality of service (QoS) and a tendency to increase the required wireless resources, if necessary.

That is, according to UE200A (and gNB100A), even when URLLC such as NPN-UE is provided and PLMN is accessed, adverse effects on communication of other terminals such as PLMN-UE can be suppressed.

In this embodiment, the UE 200A can control access to the network based on the access type it holds, specifically, the mapping table shown in FIG. Since the mapping table includes URLLC as described above, the UE200A can realize reliable access control for URLLC. As a result, adverse effects on communication of other terminals such as PLMN-UE can be reliably suppressed.

In this embodiment, as described above, access regulation and access control are executed especially for NPN-UE that provides URLLC. Therefore, even when NPN-UE transitions to PLMN20, access by NPN-UE associated with URLLC can be reliably regulated. As a result, adverse effects on communication of other terminals such as PLMN-UE can be suppressed more reliably.

(5) Other Embodiments Although the contents of the present invention have been described above with reference to the examples, the present invention is not limited to these descriptions, and various modifications and improvements are possible. It is self-evident to the trader.

For example, in the above-described embodiment, access regulation and access control for UE200A for NPN40 (non-public mobile communication network) that provides URLLC have been described, but URLLC, that is, high-reliability and low-delay communication is provided. If it is a terminal, access regulation and access control may be executed not necessarily for NPN-UE but for PLMN-UE.

Similarly, in the above-described embodiment, the case where the NPN-UE transitions to PLMN20 has been described as an example, but for example, when the operator transitions between different PLMNs, even if the above-mentioned access regulation and access control are applied. Good.

Further, the block configuration diagram (FIGS. 2 and 3) used in the description of the above-described embodiment shows the block of the functional unit. These functional blocks (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.

Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. There are broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but only these. I can't. For example, a functional block (constituent unit) for functioning transmission is called a transmitting unit or a transmitter. As described above, the method of realizing each of them is not particularly limited.

Further, the above-mentioned gNB100A, gNB100B, UE200A and UE200B (the device) may function as a computer for processing the wireless communication method of the present disclosure. FIG. 7 is a diagram showing an example of the hardware configuration of the device. As shown in FIG. 7, the device may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following explanation, the word "device" can be read as a circuit, device, unit, etc. The hardware configuration of the device may be configured to include one or more of each of the devices shown in the figure, or may be configured not to include some of the devices.

Each functional block of the device (see FIGS. 2 and 3) is realized by any hardware element of the computer device or a combination of the hardware elements.

Further, for each function in the device, the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the memory 1002, and controls the communication by the communication device 1004, or the memory. It is realized by controlling at least one of reading and writing of data in 1002 and storage 1003.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like.

Further, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. Further, the various processes described above may be executed by one processor 1001 or may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one such as ReadOnlyMemory (ROM), ErasableProgrammableROM (EPROM), Electrically ErasableProgrammableROM (EEPROM), and RandomAccessMemory (RAM). May be done. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can execute the method according to the embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, for example, an optical disk such as Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, or a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. Storage 1003 may be referred to as auxiliary storage. The recording medium described above may be, for example, a database, server or other suitable medium containing at least one of the memory 1002 and the storage 1003.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.

The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be composed of.

The input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

In addition, each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information. Bus 1007 may be configured using a single bus or may be configured using different buses for each device.

Further, the device includes hardware such as a microprocessor, a digital signal processor (Digital Signal Processor: DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), and a Field Programmable Gate Array (FPGA). The hardware may implement some or all of each functional block. For example, processor 1001 may be implemented using at least one of these hardware.

Further, the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using another method. For example, information notification includes physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI), upper layer signaling (eg, RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block)). (MIB), System Information Block (SIB)), other signals or a combination thereof. RRC signaling may also be referred to as an RRC message, for example, RRC Connection Setup. ) Message, RRC Connection Reconfiguration message, etc. may be used.

Each aspect / embodiment described in the present disclosure includes LongTermEvolution (LTE), LTE-Advanced (LTE-A), SUPER3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system ( 5G), FutureRadioAccess (FRA), NewRadio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UltraMobile Broadband (UMB), IEEE802.11 (Wi-Fi (registered trademark)) , IEEE802.16 (WiMAX®), IEEE802.20, Ultra-WideBand (UWB), Bluetooth®, and other systems that utilize appropriate systems and at least one of the next generation systems extended based on them. It may be applied to one. In addition, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.

In some cases, the specific operation performed by the base station in the present disclosure may be performed by its upper node. In a network consisting of one or more network nodes having a base station, various operations performed for communication with a terminal are performed by the base station and other network nodes other than the base station (for example, MME or). It is clear that it can be done by at least one of (but not limited to, S-GW, etc.). Although the case where there is one network node other than the base station is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information and signals (information, etc.) can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

The input / output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information can be overwritten, updated, or added. The output information may be deleted. The input information may be transmitted to another device.

The determination may be made by a value represented by 1 bit (0 or 1), by a true / false value (Boolean: true or false), or by comparing numerical values (for example, a predetermined value). It may be done by comparison with the value).

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.

Further, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, a website, where the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.). When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

The information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.

Note that the terms explained in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Also, the signal may be a message. Further, the component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably.

In addition, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, the radio resource may be indexed.

The names used for the above parameters are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. Since various channels (eg, PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are in any respect limited names. is not it.

In this disclosure, "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", " "Access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "cell group" Terms such as "carrier" and "component carrier" can be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

The base station can accommodate one or more (for example, three) cells (also called sectors). When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)). Communication services can also be provided by Head: RRH).

The term "cell" or "sector" refers to a base station that provides communication services in this coverage, and part or all of the coverage area of at least one of the base station subsystems.

In the present disclosure, terms such as "mobile station (MS)", "user terminal", "user equipment (UE)", and "terminal" may be used interchangeably. ..

Mobile stations can be subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless, depending on the trader. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation. For example, at least one of a base station and a mobile station may be an Internet of Things (IoT) device such as a sensor.

Further, the base station in the present disclosure may be read as a mobile station (user terminal, the same applies hereinafter). For example, communication between a base station and a mobile station has been replaced with communication between a plurality of mobile stations (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the mobile station may have the functions of the base station. In addition, words such as "up" and "down" may be read as words corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, and the like may be read as a side channel.

Similarly, the mobile station in the present disclosure may be read as a base station. In this case, the base station may have the functions of the mobile station.
The radio frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe.
Subframes may further consist of one or more slots in the time domain. The subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.

The numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology includes, for example, SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, wireless frame configuration, transmission / reception. At least one of a specific filtering process performed by the machine in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.

The slot may be composed of one or more symbols (Orthogonal Frequency Division Multiple Access (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. Slots may be unit of time based on numerology.

The slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. The mini-slot may also be referred to as a sub-slot. A minislot may consist of a smaller number of symbols than the slot. PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.

The wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal. The radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.

For example, one subframe may be referred to as a transmission time interval (TTI), a plurality of consecutive subframes may be referred to as TTI, and one slot or one minislot may be referred to as TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms. It may be. The unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.

Here, TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in an LTE system, a base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units. The definition of TTI is not limited to this.

The TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation. When a TTI is given, the time interval (for example, the number of symbols) to which the transport block, code block, code word, etc. are actually mapped may be shorter than the TTI.

When one slot or one mini slot is called TTI, one or more TTIs (that is, one or more slots or one or more mini slots) may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like. TTIs shorter than normal TTIs may also be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.

The long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) may be read as less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.

The resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain. The number of subcarriers contained in RB may be the same regardless of numerology, and may be, for example, 12. The number of subcarriers contained in the RB may be determined based on numerology.

Further, the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.

One or more RBs include a physical resource block (Physical RB: PRB), a sub-carrier group (Sub-Carrier Group: SCG), a resource element group (Resource Element Group: REG), a PRB pair, an RB pair, and the like. May be called.

Further, the resource block may be composed of one or a plurality of resource elements (ResourceElement: RE). For example, 1RE may be a radio resource area of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (which may also be called partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. Good. Here, the common RB may be specified by the index of the RB with respect to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP). One or more BWPs may be set in one carrier for the UE.

At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP. In addition, "cell", "carrier" and the like in this disclosure may be read as "BWP".

The above-mentioned structures such as wireless frames, subframes, slots, mini slots and symbols are merely examples. For example, the number of subframes contained in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in RB. The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two "connected" or "combined" elements. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in the present disclosure, the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. , Electromagnetic energies with wavelengths in the microwave and light (both visible and invisible) regions, etc., can be considered to be "connected" or "coupled" to each other.

The reference signal can also be abbreviated as Reference Signal (RS), and may be called a pilot (Pilot) depending on the applicable standard.

The phrase "based on" as used in this disclosure does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

The "means" in the configuration of each of the above devices may be replaced with "part", "circuit", "device" and the like.

Any reference to elements using designations such as "first", "second" as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted there, or that the first element must somehow precede the second element.

When "include", "including" and variations thereof are used in the present disclosure, these terms are as comprehensive as the term "comprising". Is intended. Moreover, the term "or" used in the present disclosure is intended not to be an exclusive OR.

In the present disclosure, if articles are added by translation, for example, a, an and the in English, the disclosure may include that the nouns following these articles are in the plural.

The terms "determining" and "determining" used in this disclosure may include a wide variety of actions. "Judgment" and "decision" are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). (For example, searching in a table, database or another data structure), ascertaining may be regarded as "judgment" or "decision". Also, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (Accessing) (for example, accessing data in memory) may be regarded as "judgment" or "decision". In addition, "judgment" and "decision" mean that the things such as solving, selecting, choosing, establishing, and comparing are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include considering some action as "judgment" and "decision". Further, "judgment (decision)" may be read as "assuming", "expecting", "considering" and the like.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". The term may mean that "A and B are different from C". Terms such as "separate" and "combined" may be interpreted in the same way as "different".

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure may be implemented as an amendment or modification without departing from the purpose and scope of the present disclosure, which is determined by the description of the scope of claims. Therefore, the description of the present disclosure is for the purpose of exemplary explanation and does not have any limiting meaning to the present disclosure.

10 Wireless communication system 20 PLMN
30 network nodes 40 NPN
100A, 100B gNB
110 Wireless transmitter 120 Wireless receiver 130 Connection processing unit 140

Access control unit

200A, 200B UE
210 Wireless transmitter 220 Wireless receiver 230 Access control unit 240 Connection message transmitter 250 Access category holder 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus

Claims

A control unit that controls access to the network,
A terminal including a transmission unit that transmits a message including a connection establishment reason indicating that the access type to the network is higher reliability or lower delay communication than other access types to the network.
A holding unit that holds the access type associated with the high-reliability or low-delay communication is provided.
The terminal according to claim 1, wherein the control unit controls access to the network based on the access type held in the holding unit.
The network includes a public mobile communication network and a non-public mobile communication network different from the public mobile communication network.
The terminal according to claim 1 or 2, wherein when the transmission unit transitions from the non-public mobile communication network to the public mobile communication network, the transmission unit transmits the message including the connection establishment reason to the public mobile communication network.